i fount this puzle in a book :there are 5 person's + 1 monkeythey shipwrek on a Islandthe fisrst day they colect kokonut'sin the night happens this :eats person goes to the piledivides it in 5 hides 1/5and gives 1 to the monkeythe 2e daythay divide the remaining pile in 5and give 1 to the monkeynow calc the size of every pile